<template>
  <el-table :data="formatData" size="mini" :row-style="showRow" v-bind="$attrs">
    <el-table-column v-if="columns.length===0" width="150" height="400" show-overflow-tooltip>
      <template slot-scope="scope">
        <span v-for="space in scope.row._level" :key="space" class="ms-tree-space"/>
        <span v-if="iconShow(0,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
          <i v-if="!scope.row._expanded" class="el-icon-plus"/>
          <i v-else class="el-icon-minus"/>
        </span>
        {{ scope.$index }}
      </template>
    </el-table-column>
    <el-table-column v-for="(column, index) in columns" v-else :key="column.value" :label="column.text" :width="column.width" show-overflow-tooltip>
      <template slot-scope="scope">
        <!-- Todo -->
        <!-- eslint-disable-next-line vue/no-confusing-v-for-v-if -->
        <span v-for="space in scope.row._level" v-if="index === 0" :key="space" class="ms-tree-space"/>
        <span v-if="iconShow(index,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
          <i v-if="!scope.row._expanded" class="el-icon-plus"/>
          <i v-else class="el-icon-minus"/>
        </span>
        {{ scope.row[column.value] }}
      </template>
    </el-table-column>
    <el-table-column fixed="right" label="操作" align="center">
      <template slot-scope="scope">
        <el-button @click="handleClick(scope.row,button.name)" v-if="button.type === 'BUTTON_LIST' && scope.row.type!=='BUTTON' && button.name==='add'" v-for="button in $store.state.buttons" :key="button.id" type="text" size="small">{{button.title}}</el-button>
        <el-button @click="handleClick(scope.row,button.name)" v-if="button.type === 'BUTTON_LIST' && button.name!=='add'" v-for="button in $store.state.buttons" :key="button.id" type="text" size="small">{{button.type}}{{button.title}}</el-button>
      </template>
    </el-table-column>
    <slot/>
  </el-table>
</template>

<script>
/**
 Auth: Lei.j1ang
 Created: 2018/1/19-13:59
 */
import treeToArray from "./eval";
export default {
  name: "TreeTable",
  props: {
    /* eslint-disable */
    data: {
      type: [Array, Object],
      required: true,
      buttons: Array
    },
    columns: {
      type: Array,
      default: () => []
    },
    evalFunc: Function,
    evalArgs: Array,
    expandAll: {
      type: Boolean,
      default: false
    }
  },
  computed: {
    // 格式化数据源
    formatData: function() {
      let tmp;
      if (!Array.isArray(this.data)) {
        tmp = [this.data];
      } else {
        tmp = this.data;
      }
      const func = this.evalFunc || treeToArray;
      const args = this.evalArgs
        ? Array.concat([tmp, this.expandAll], this.evalArgs)
        : [tmp, this.expandAll];
      return func.apply(null, args);
    }
  },
  methods: {
    handleClick(row,button){
      let _this = this;
      _this.$emit('clickCallback',row,button)
    },
    showRow: function(row) {
      const show = row.row.parent
        ? row.row.parent._expanded && row.row.parent._show
        : true;
      row.row._show = show;
      return show
        ? "animation:treeTableShow 1s;-webkit-animation:treeTableShow 1s;"
        : "display:none;";
    },
    // 切换下级是否展开
    toggleExpanded: function(trIndex) {
      const record = this.formatData[trIndex];
      record._expanded = !record._expanded;
    },
    // 图标显示
    iconShow(index, record) {
      return index === 0 && record.children && record.children.length > 0;
    }
  }
};
</script>
<style rel="stylesheet/css">
  @keyframes treeTableShow {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }
  @-webkit-keyframes treeTableShow {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }
</style>

<style scoped>
  .ms-tree-space {
    position: relative;
    top: 1px;
    display: inline-block;
    font-style: normal;
    font-weight: 400;
    line-height: 1;
    width: 18px;
    height: 14px;
  }
  .ms-tree-space::before {
    content: "";
  }
  .processContainer {
    width: 100%;
    height: 100%;
  }
  table td {
    line-height: 26px;
  }
  .tree-ctrl {
    position: relative;
    cursor: pointer;
    color: #2196f3;
    margin-left: -18px;
  }
</style>
